Lamp focusing and adjusting device



Oct. 23, 1928. 1,688,544

s w. HYATT LAMP FOCUSING AND ADJUSTING DEVICE Filed Jan. 28, 1927 PIE]. 1

36 3 Z4 40 3! 1+ 5. 32 a II "I ,zi/zw 2 AQORNEYJ r SAMUEL w.

l atentecl Oct. 123, 1928.

STATE 5PATEN'TYTQFF33E Y smart, or CONNERSVILLE, INDIANA,Ass e-Noa'rotannins LAMB oon ronA'riou, or GONNERSVILLE, instill-nar CORPORATION.

LAMP FOCUSING'AND ADJ 'USTIN G DEVICE.

Application filed January 28, 1927. SeriallNo. 1 64,18 1.

This invention relatesto a focusing and tilting control for headlights. H I

The chief obect 01 this inventio'n is, provide a. multiple control for focusing and tilting which is simple in character and which will not be disturbed rom the adjusted position by vibration and the like. 1 The chief feature of the invention consists in the provision of a socket support nthe form of ayoke and a lever associated there with tor'tilting the same said yoke being tiltable and movable to and fro for focusing by a pair 01 bolts in substantially parallel relation. I w I V Another feature of the invention consists in the formation of, the yoke with wings which are slidable longitudinally and'transg rersely of the elongated slots formed asext-ensionsof an elongatedellipticalopening in the reflector receiving the socket and yoke.

The full nature of the ii'ivention will be understood from the accompanying drawings and the following description and claims:

Fig. 1 is a central sectional view of a portion of a headlight with parts shown in elevation and in the upward tilted position. Fig. 2 is a view similar thereto but with the parts in the lowered or depressed tilted position. Fig. 3 is a transverse section taken on line 3-3 of Fig. land in the direction of the arrows.

In the drawings,

A light bulb i2 is detachably mounted in the connecting plug or socket 13 and is in electrical connection thereby with the current conducting wires 14. The foregoing consists in the usual or conventional lamp construction including other parts not shown.

A yoke 15 is suitably secured as by sweating or the like, to the socket 13 and said yoke includes a transverse rear portion lfi'apertured and threaded as at 17. The casing is provided with a similarly aligned opening indicates a suitable casing and 11 a reflector enveloped thereby;

or'laterallyas at 23and each lateral extension is againturned angularly so as to lie parallel with the body portion as at 24;.

The extensions23 and 2t form wings re ceivable by elongated diametrical slots 25 i'orn ed in the reflector and tormed as continu-v ations upon opposite sides of an elongated slot or 0peni1ig26, thesaine having a width? atleastequal'to the socket 13. The elongatec rearward extensions 2 1thus prevent rotative novement of the yoke for all positions or the yoke and thus the yoke may bemoved axially to and fro without rotative movement being imparted thereto. Y

The means fortilting the socket 153 is herein shown as including an angular lever having one end tulcrumedupon the casing immediately adjacent theslightly enlarged opening 18 and-havingfits opposite fend :31 apertured and threaded toreceive a bolt 32 positioned parallel to'bolt 22 and in substantially the sameformation, that is, having an ex- I posed portion without the casing for external manipulation. The lever intermediate the ends 30 and 31 is substantially U-shaped as at 33 and is apertured as at 34 and 35, so as normally bears on the mid-portion 16 01 the yoke and also bears upon the lever intermeto rotatably support bolt 22. Thus, thread i ing movement-or bolt 22 has no etl'e'cton the Sir diate its ends to insure bearing of the lever on the casing at the fulcrum. Both springs are concentric with their respective support ing bolts and bothlbolts are herein shown provided on their inner, ends with angular enlargements 10 to prevent undue unthreading movement.

The OPGI'ZLtlOlTlS as follows: Rotationof bolt 22 secures notilting action of the light bulb or socket 13, but merely focuses the same in the reflector, the movement being parallel to the axis of the reflector as shown here n.

' prevents rotation of the'lever whenbo lt 32 is rotated since the-yoke'cannot rotate by reason of the wings 24clying in the elongated slots 25. Figure 1 shows the spring 36 co1n- Threading movement of the bolt 32 causes ing where bolt 22 passes through the same. The two bolts 32 and 22 are-substantially pressed and the lever tilted upwardly with the yoke arranged in the upward position. Figure 2 shows spring 36 relatively expanded and the lever tilted downwardly with the re sult that the yoke is positioned in its lowermosttilted position, the fulcrum oi the lever 1 being coincident with the bearing on the casparallel to each other and the pivotal axis of the lever is substantiallytransverse t and intersects the focusing axisincluding the bolt 22.

- a rotatable swivelably mounted member hav- The invention claimed is: a 1. In combination 1n a lamp having a light bulb support and a casing, a reflector therein with an elongated centrally positioned slotv through which said light bulb support projects, said slot having oppositely directed aligned extensions, a U-shaped light bulb support supporting strap, said support being secured at the free end of said strap, said strap having a threaded contral aperture and a pair 01 laterally and outwardly directed arms seatable in said slot extensions and longitudinally and transversely movable therein, and

ing a tool engageablecasing exposed portion and an opposite-threaded portion for central" aperture threaded engagement,another mein ber similar to the first mentioned member and similarly mounted upon said casing and in adjacentand substantially parallel rela-f tion-thereto, and an angular lever having multiple anchorage on said first mentioned memberan d threaded". engagement with the :40 v the strap with the light bulb support in said 3. A device as defined by claim 1',characterized by the addition of yielding means between the lever and' casing and other yield ing means between the lever and Ll-shaped strap, said yielding means being supported by the rotatable members and being concentric therewith. I I

In Witness whereof, I have hereunto afixed my signature. r

SAMUEL WI HYATT. 

